Hi,
>>>The OSD module does not detect language - it detect script, as you also
>>>noted earlier:
It detects language by using OSD in tesseract and tesseract also provides
DetectOrientationScript function.
api.Init("/Users/renard/devel/textfairy/tessdata", "osd",
tesseract::OcrEngineMode::OEM_DEFAULT);
api.SetPageSegMode(tesseract::PageSegMode::PSM_OSD_ONLY);
api.SetImage(pix);
api.DetectOrientationScript(&orient_deg, &orient_conf, &script_name,
&script_conf);
After this, script_name will get language name and script_conf will get
confidence value.
As I tested several languages, scipt_name gets following values.
English -> 'Latin'
French->'Latin'
German->'Latin'
Chinese_Sim -> 'Han'
Chinese_Tra -> 'Han'
Korean -> 'Korean'
Japanese -> 'Japanese'
Russian -> 'Cyrillic'
So the problem is that I want to distinguish Latin languages exactly and I
want to detects several languages once from an image.
Thanks.
Best,
Charles.
On Friday, March 26, 2021 at 2:33:26 AM UTC+8 Merlijn Wajer wrote:
> Hi,
>
> On 25/03/2021 19:04, Charles Cho wrote:
> > Hi.
> >
> > Thank you very much for your kind help, shree.
> > I tried to detect script by your help and it worked. Great.
> >
> > I have some questions.
> > 1. If the image contains texts of different languages in a page, is
> there
> > any way to detect all of the languages? Now it detects only one
> language.
> > 2. It detects English, German, French as 'Latin'. So how can I
> distinguish
> > the languages exactly?
>
> The OSD module does not detect language - it detect script, as you also
> noted earlier:
>
> >>> So in my analysis, it used OSD of tesseract engine to detect layout
> and
> >>> script.
> >>> After detect script, it detects languages on the script.
>
> What's missing is performing OCR using just the script - and then
> analysing the corpus to detect the language.
>
> You could use something like this: https://github.com/saffsd/langid.c
>
> Regards,
> Merlijn
>
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